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<title>TraffoSim Downloader</title>
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<pre><strong>Primary Actor</strong>: TraffoSim Downloader

</pre>
<pre><strong>Stakeholders and Interest</strong>:</pre>
<pre>Downloader: Want correct installment for the right system.</pre>
<pre>Installation Tester:&nbsp; Needs the application to test if installation is ok.</pre>
<pre>Simulator Operator, Analysis Development, etc, all need to use the simulator for testing purposes.</pre>
<pre>&nbsp;</pre>
<pre><strong>Preconditions</strong>:</pre>
<pre>Active internet connection - for verification and downloading.</pre>
<pre>Valid E-mail address - for legitimate access to program and resources.</pre>
<pre>Hardware and System requirements (enough memory and CPU power necessary)</pre>
<pre>&nbsp;</pre>
<pre><strong>Success Guarantee (postconditions)</strong>:</pre>
<pre>Successful downloading of TraffoSim.</pre>
<pre>Ready to run.</pre>
<pre>&nbsp;</pre>
<pre><strong>Main Success Scenario</strong> (typical acquiring and installation of TraffoSim)</pre>
<pre>  1.  Downloader: goes to the website, enters required information including an email validation address.</pre>
<pre>  2.  Downloader: receives an email some validation to acquire TraffoSim.</pre>
<pre>  3.  Downloader: Goes back to the webpage, uses verification to get to the download page, and selects a specific installer.</pre>
<pre>  4.  Downloader: verifies that entered installer is correct, and starts the download.</pre>
<pre>  5.  Downloader: Download completed and ready to install.</pre>
<pre>&nbsp;</pre>
<pre><strong>Extensions (Alternate course)</strong>:</pre>
<pre>  1a. Entered invalid information (name, etc):</pre>
<pre>    1. Downloader can access (through email identifier) entered information and edit.</pre>
<pre>  1b. Entered invalid information (email account):</pre>
<pre>    1. The system displays an error message or Downloader is able to go through entering the process again.</pre>
<pre>  3a. Unable to get to downloads page:</pre>
<pre>    1. Downloader is able to request sending another validation email.</pre>
<pre>    2. The system may have an error, but Downloader is able to go through Step 1, again.</pre>
<pre>  4a. Wrong data entered:</pre>
<pre>    1. Downloader is able to go back and reselect correct installer.</pre>
<pre>  5a. Download interrupted:</pre>
<pre>    1. If download is interrupted for some reason Downloader can return to downloads page, enter validation and re-download TraffoSim.</pre>
<pre>&nbsp;</pre>
<pre><strong>Special Requirements</strong>:</pre>
<pre>    n/a


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<pre><strong>Technology and Data Variations List</strong>:</pre>
<pre>&nbsp;&nbsp;&nbsp; *different computer OS*</pre>
<pre>&nbsp;</pre>
<pre><strong>Frequency of Occurrence</strong>:</pre>
<pre>&nbsp;&nbsp; Rare.</pre>

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